Combination level and plumb.



J. F. GARLSON.

COMBINATION LEVEL AND PLUMB.

APPLICATION FILED FEB. 17, 1911.

1,01 3,274. Patented Jan. 2, 1912.

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JOHN F. CAR-LS-ON, OF DES MOINES, IOWA.

COMBINATION LEVEL AND PLUMB.

Specification of Letters Patent.

Application filed February 17, 1911.

Patented Jan. 2, 1912.

Serial No. 609,162.

To all whom it may concern:

Be it known that I, JoHN F. CARLSON, a citizen of the United States,residing in Des Moines, county of Polk, and State of Iowa, have inventeda new and useful Improvement in Combination Levels and Plumbs, of whichthe following is a specification.

The object of my invention is to provide a mechanically constructedcombination level and plumb, simple, strong, durable and inexpensive, inconstruction, and which can be relied upon for accurately and trulyindicating the inclination of the surface to which it is applied.

My invention consists of certain details of construction, hereinafterset forth, pointed out in my claim, and illustrated in the accompanyingdrawings, in which Figure I shows a plan view of my device; Fig. IIshows a detail view of a part of my device, in plan, a portion of theupper strip being broken away to show the construction of the mechanicalparts; Fig. III shows a sectional view taken on the line IIIIII, in Fig.II; and Fig. IV shows a sectional view taken on the line IVIV in Fig.II.

Referring to the accompanying drawings the reference numeral 10 is usedto indicate the block of wood, or metal, which constitutes the level,the same usually being formed of two outer strips of material, separatedby an interposed strip, as shown, to form a pocket 11, in which theindicating device is mounted.

The indicating device is composed of a weight 12 pivotally suspendedfrom an up per bearing 13, secured in the frame of the level, saidweight being, preferably, secured to a depending rod, as shown. Thehearing may be a ball or roller, bearing if desired to decreasefriction. Near the base of the weight and extending completely acrossthe same, its bearings being in the frame work of the level I havemounted a cross bar 14:, and in the central lower portion of said crossbar is a post, or pin 15, designed as a bearing on which is mounted, forrotary movement, an indicating needle 16, its upper end projecting abovethe upper bearing 13. The lower extremity of said needle is broadenedand extends below the post bearing 15, and is provided with a slot 17which is open at the base and extends upwardly therefrom. This slot 17is designed to receive a post, or pin, 18, secured to the lower centralportion of the weight 12.

The sides of the level are provided with openings, 19 and 20, designedto be covered with glass, or other transparent material, through whichthe indicating needle 16 may be seen, and on a separate strip, 21,secured, in proper manner, in the level, a scale bar is displayed, saidscale bar and needle being in such relation to each other that theoscillation of the needle will be indicated by the scale bar. I haveprovided posts, or pins 22, secured as shown, to limit the movement ofthe needle. The base of the needle below its bearing, is broadened asshown, to equalize, or nearly equalize, the weight of the needle aboveand below its mounting for, it is obvious, this will permit of easieroperation of the needle.

From my construction, as shown and described, it is obvious that themovement of the upper part of the level, to one side or the other, willcause the needle to move in the opposite direction and the degree whichthe level assumes will be truly and accurately indicated on the scalebar.

Having thus described my invention what I claim and desire to secure byLetters Patent of the United States is:

A combination level and plumb comprising a block of material providedwith a pocket; a weight suspended, for oscillation, in said pocket; 2.post centrally located on the base of said weight; a cross-bar extendingacross said pocket near the base of the weight; a needle mounted, foroscillation, on the central portion of said cross-bar, its lower endbeing slotted to receive the post on the weight, its upper extremityprojecting upwardly above the weight; transparent material coveringapertures which are provided in the block, anddesigned to reveal theupper portion of the needle; and a scale bar to indicate the degree ofoscillation of the needle all arranged and combined substantially asshown and described.

Witnesses:

E. 0. Ron, ZELL G. Ron.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, I). G.

